LXR qemu/include/hw/irq.h

   1#ifndef QEMU_IRQ_H
   2#define QEMU_IRQ_H
   3
   4/* Generic IRQ/GPIO pin infrastructure.  */
   5
   6#define TYPE_IRQ "irq"
   7
   8typedef struct IRQState *qemu_irq;
   9
  10typedef void (*qemu_irq_handler)(void *opaque, int n, int level);
  11
  12void qemu_set_irq(qemu_irq irq, int level);
  13
  14static inline void qemu_irq_raise(qemu_irq irq)
  15{
  16    qemu_set_irq(irq, 1);
  17}
  18
  19static inline void qemu_irq_lower(qemu_irq irq)
  20{
  21    qemu_set_irq(irq, 0);
  22}
  23
  24static inline void qemu_irq_pulse(qemu_irq irq)
  25{
  26    qemu_set_irq(irq, 1);
  27    qemu_set_irq(irq, 0);
  28}
  29
  30/* Returns an array of N IRQs. Each IRQ is assigned the argument handler and
  31 * opaque data.
  32 */
  33qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n);
  34
  35/*
  36 * Allocates a single IRQ. The irq is assigned with a handler, an opaque
  37 * data and the interrupt number.
  38 */
  39qemu_irq qemu_allocate_irq(qemu_irq_handler handler, void *opaque, int n);
  40
  41/* Extends an Array of IRQs. Old IRQs have their handlers and opaque data
  42 * preserved. New IRQs are assigned the argument handler and opaque data.
  43 */
  44qemu_irq *qemu_extend_irqs(qemu_irq *old, int n_old, qemu_irq_handler handler,
  45                                void *opaque, int n);
  46
  47void qemu_free_irqs(qemu_irq *s, int n);
  48void qemu_free_irq(qemu_irq irq);
  49
  50/* Returns a new IRQ with opposite polarity.  */
  51qemu_irq qemu_irq_invert(qemu_irq irq);
  52
  53/* Returns a new IRQ which feeds into both the passed IRQs.
  54 * It's probably better to use the TYPE_SPLIT_IRQ device instead.
  55 */
  56qemu_irq qemu_irq_split(qemu_irq irq1, qemu_irq irq2);
  57
  58/* Returns a new IRQ set which connects 1:1 to another IRQ set, which
  59 * may be set later.
  60 */
  61qemu_irq *qemu_irq_proxy(qemu_irq **target, int n);
  62
  63/* For internal use in qtest.  Similar to qemu_irq_split, but operating
  64   on an existing vector of qemu_irq.  */
  65void qemu_irq_intercept_in(qemu_irq *gpio_in, qemu_irq_handler handler, int n);
  66
  67#endif
  68